CAJ | 학술논문

运用郎缪尔-布尔吉特法在聚酰亚胺衬底上制备聚偏氟乙烯及三氟乙烯(P(VDF-TrFE))共聚物薄膜.不同厚度薄膜的X射线衍射结果表明,薄膜具有良好的结晶特性,取向为(110).运用波长范围为300～1300nm的椭圆偏振光谱仪对薄膜光学特性进行了表征;运用Cauchy模型对不同角度(θ=75°和85°)测得的Ψ和Δ数据进行了拟合.获得了P(VDF-TrFE)薄膜的光学参数n, k, α以及薄膜的厚度.另外对薄膜的铁电性质的测量,其剩余极化达到了6.3μC/cm2, 矫顽电场为100MV/cm.介电测量得到了薄膜两个明显的相变,铁电-介电相变以及β弛豫.
운용랑무이-포이길특법재취선아알츤저상제비취편불을희급삼불을희(P(VDF-TrFE))공취물박막.불동후도박막적X사선연사결과표명,박막구유량호적결정특성,취향위(110).운용파장범위위300～1300nm적타원편진광보의대박막광학특성진행료표정;운용Cauchy모형대불동각도(θ=75°화85°)측득적Ψ화Δ수거진행료의합.획득료P(VDF-TrFE)박막적광학삼수n, k, α이급박막적후도.령외대박막적철전성질적측량,기잉여겁화체도료6.3μC/cm2, 교완전장위100MV/cm.개전측량득도료박막량개명현적상변,철전-개전상변이급β이예.
Poly (vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) thin films were deposited on polyimide substrate using horizontal Langmuir-Blodgett(LB) technology. X-ray diffractions indicate that the films have good crystallinity with (110) preferential orientation for films with different thickness. The optical dispersion of the films were measured by variable-angle spectroscopic ellipsometry. The data Ψ and Δ at multiple incident angels (θ=75° and 85°) were fitted using the Cauchy model. The refractive index, extinction coefficient,absorption coefficient and thickness of each film were obtained. The ferroelectric of the films were studied. The remnant polarization is up to 6.3μC/cm2. The coercive field is 100MV/cm. The dielectric measurement for the film shows two distinctive phase transitions, ferroelectric-paraelectric phase transition and β relaxation.